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* dwarf2read.c (add_partial_symbol): Do not add a global variable if
	its adress is null. Add comment to explain why.
	(new_symbol): Ditto.
This commit is contained in:
Jerome Guitton 2010-07-26 09:30:00 +00:00
parent ad0a41197c
commit caac4577e5
2 changed files with 29 additions and 5 deletions
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6
gdb/ChangeLog
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@ -1,3 +1,9 @@
2010-07-26 Jerome Guitton <guitton@adacore.com>
* dwarf2read.c (add_partial_symbol): Do not add a global variable if
its adress is null. Add comment to explain why.
(new_symbol): Ditto.
2010-07-25 Jan Kratochvil <jan.kratochvil@redhat.com>
* linux-nat.c (linux_nat_do_thread_registers): Convert STOP_SIGNAL to

28
gdb/dwarf2read.c
View File

@ -3569,7 +3569,19 @@ add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu)
}
break;
case DW_TAG_variable:
if (pdi->is_external)
if (pdi->locdesc)
addr = decode_locdesc (pdi->locdesc, cu);
if (pdi->locdesc
&& addr == 0
&& !dwarf2_per_objfile->has_section_at_zero)
{
/* A global or static variable may also have been stripped
out by the linker if unused, in which case its address
will be nullified; do not add such variables into partial
symbol table then. */
}
else if (pdi->is_external)
{
/* Global Variable.
Don't enter into the minimal symbol tables as there is
@ -3584,8 +3596,6 @@ add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu)
used by GDB, but it comes in handy for debugging partial symbol
table building. */
if (pdi->locdesc)
addr = decode_locdesc (pdi->locdesc, cu);
if (pdi->locdesc || pdi->has_type)
psym = add_psymbol_to_list (actual_name, strlen (actual_name),
built_actual_name,
@ -3603,7 +3613,6 @@ add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu)
xfree (actual_name);
return;
}
addr = decode_locdesc (pdi->locdesc, cu);
/*prim_record_minimal_symbol (actual_name, addr + baseaddr,
mst_file_data, objfile); */
psym = add_psymbol_to_list (actual_name, strlen (actual_name),
@ -10006,7 +10015,16 @@ new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
{
var_decode_location (attr, sym, cu);
attr2 = dwarf2_attr (die, DW_AT_external, cu);
if (attr2 && (DW_UNSND (attr2) != 0))
if (SYMBOL_CLASS (sym) == LOC_STATIC
&& SYMBOL_VALUE_ADDRESS (sym) == 0
&& !dwarf2_per_objfile->has_section_at_zero)
{
/* When a static variable is eliminated by the linker,
the corresponding debug information is not stripped
out, but the variable address is set to null;
do not add such variables into symbol table. */
}
else if (attr2 && (DW_UNSND (attr2) != 0))
{
struct pending **list_to_add;